Skyrim Takes Top Chart Spot

Is it due to the recent price drop from GameStation for just £19.99 on PC or £22.49 on Xbox 360 or PlayStation 3 until December 14th that The Elder Scrolls V: Skyrim has taken the number one slot in this weeks charts?
Possibly, and that sends Call of Duty: Modern Warfare 3 down a place to break its current streak at the top, but the rest of the chart has only had a slight shuffle, nothing to get too excited about.